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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (HVAC - Climate Control System - General Information And Diagnostics (Hybrid)) >> Diagnosis And Testing >> Climate Control System >> Pinpoint Tests >> Pinpoint Test D: DTC P0AFA:16 or P0AFB:17 >> Pinpoint Test D: DTC P0AFA:16 Or P0AFB:17

Pinpoint Test D: DTC P0AFA:16 Or P0AFB:17

WARNING: This page is about a different variant/trim than selected.
WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage hybrid system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.
NOTE: Before carrying out the following test, diagnose any PCM or Battery Energy Control Module (BECM) DTCs.
  1. D1 CHECK THE HIGH-VOLTAGE BEC HIGH-VOLTAGE LOW-CURRENT FUSE 
    WARNING: Never install the service disconnect plug with the high-voltage bussed electrical center (BEC) cover removed. Always install the cover prior to connecting the service disconnect plug. The high-voltage BEC cover prevents inadvertent contact with the high voltage which is present at several points under the cover. Failure to follow these instructions may result in serious personal injury or death.
    • Ignition OFF.
    • Depower the HVTB  . Refer to HIGH-VOLTAGE TRACTION BATTERY SYSTEMS DEPOWERING .
    • Remove the high-voltage Bussed Electrical Center (BEC) cover. Refer to REMOVAL AND INSTALLATION procedure.
    • Inspect and measure the resistance of the high-voltage low-current fuse.
      Fig 1: Measuring Resistance Of High-Voltage Low-Current Fuse
      G06262703Courtesy of FORD MOTOR CO.
    • Is the fuse undamaged and the resistance less than 5 ohms? 
    • Yes:  GO to  D2.
    • No:  INSTALL a new high-voltage, low-current fuse. INSPECT the high-voltage BEC  for signs of an obvious short condition. INSTALL a new high-voltage BEC  as needed. If an obvious short condition is not identified, CARRY OUT self-test of the Battery Energy Control Module (BECM). REFER to HIGH-VOLTAGE TRACTION BATTERY to diagnose BECM DTCs.
  2. D2 COMPARE THE ACCM HIGH VOLTAGE PID WITH THE BECM HIGH VOLTAGE PID 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Hybrid Battery Pack Voltage (BATPACKVOLT) Battery Energy Control Module (BECM) PID.
    • Enter the following diagnostic mode on the scan tool: Electric A/C Compressor High Voltage Supply (ACCM_CHVS) Air Conditioning Compressor Module (ACCM) PID.
    • Compare the BATPACKVOLT BECM  PID voltage with the ACCM_CHVS ACCM  PID voltage.
    • Are both voltages approximately the same? 
    • Yes:  CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. If the DTCs return  , INSTALL a new ACCM  . REFER to CLIMATE CONTROL . TEST the system for normal operation. If the DTCs do not return, the system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
    • No:  INSPECT the ACCM  for loose or corroded connections. If OK, INSTALL a new ACCM  . REFER to CLIMATE CONTROL . TEST the system for normal operation.
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